diff --git a/src/Middleware/ContainerImageMiddlewareInterface.php b/src/Middleware/ContainerImageMiddlewareInterface.php
index 16783af..b3e8e96 100644
--- a/src/Middleware/ContainerImageMiddlewareInterface.php
+++ b/src/Middleware/ContainerImageMiddlewareInterface.php
@@ -8,5 +8,5 @@
 interface ContainerImageMiddlewareInterface
 {
     public function apply(Image $image, AppInterface $app): void;
-    public function priority(): int;
+    public static function priority(): int;
 }